import cv2
video = cv2.VideoCapture("yzbf.mp4")
while (video.isOpened()):
    retval, image = video.read()
    cv2.namedWindow("Video", 0)
    cv2.resizeWindow("Video", 420,300)
    if retval==True:
        cv2.imshow("Video", image)
    else:
        break
    key=cv2.waitKey(1)
    if key==27:
        break
video.release()
cv2.destroyAllWindows()